Technical specifications
Table 10: IOM2721 technical specifications
Product Code Number
MS-IOM2721-0 Input/Output Module
Power Requirement
24 VAC (nominal, 20 VAC minimum/30 VAC maximum), 50/60 Hz, power supply Class 2
(North America), Safety Extra-Low Voltage (SELV) (Europe)
Power Consumption
14 VA maximum MS-IOM2721
Ambient Conditions
Operating:
0°C to 50°C (32°F to 122°F); 10% to 90% RH noncondensing
Storage:
-40°C to 80°C (-40°F to 176°F); 5% to 95% RH noncondensing
Addressing
DIP switch set; valid expansion module device addresses 4–127 (Device addresses 0–3 and
128–255 are reserved and not valid expansion module addresses)
Communications Bus
BACnet MS/TP, RS-485:
3-wire FC Bus between the supervisory controller and other controllers or expansion
modules (for MS/TP bus communications at 38,400 baud)
4-wire SA Bus between expansion module, network sensors and other sensor/actuator
devices, includes a lead to source 15 VDC supply power (from controller or expansion
modules) to bus devices (for MS/TP bus communications at 38,400 baud)
Processor
H8SX/166xR Renesas
®
32-bit microcontroller
Memory
640 KB Flash Memory and 128 KB Random Access Memory (RAM)
Input and Output Capabilities
8 - Universal Inputs:
Defined as 0–10 VDC, 4–20 mA, 0–600k ohm, or Binary Dry Contact
2 - Analog Outputs:
Defined as 0–10 VDC or 4–20 mA
Analog Output Resolution and Accuracy Output:
16-bit resolution, +/-200 mV accuracy in 0-10 VDC applications
Terminations
Input/Output:
Fixed Screw Terminal Blocks
SA/FC Bus and Supply Power:
4-Wire and 3-Wire Pluggable Screw Terminal Blocks
Mounting
Horizontal on single 35 mm DIN rail mount (preferred), or screw mount on flat surface
with three integral mounting clips on expansion module
Housing
Enclosure material:
ABS and polycarbonate UL94 5VB; self-extinguishing, plenum-rated
Protection Class: IP20 (IEC529)
Dimensions (Height x Width x Depth)
150 mm x 164 mm x 53 mm (5-7/8 in. x 6-1/2 in. x 2-1/8 in.) including terminals and
mounting clips
Note:
Mounting space requires an additional 50 mm (2 in.) on top, bottom, and
front face of expansion module for easy cover removal, ventilation, and wire
terminations.
Weight
0.5 kg (1.1 lb)
Compliance
United States:
UL Listed, File E107041, CCN PAZX, UL 916, Energy Management
Equipment
FCC Compliant to CFR47, Part 15, Subpart B, Class A
Canada:
UL Listed, File E107041, CCN PAZX7 CAN/CSA C22.2 No.205, Signal Equipment
Industry Canada Compliant, ICES-003
Europe:
Johnson Controls declares that this product is in compliance with the essential
requirements and other relevant provisions of the EMC Directive.
Australia and New Zealand:
RCM Mark, Australia/NZ Emissions Compliant
BACnet International Compliance
BACnet International:
BACnet Testing Laboratories (BTL) Protocol Revision 4 Listed
BACnet Application Specific Controller (B-ASC).
The performance specifications are nominal and conform to acceptable industry standard. For application at conditions beyond
these specifications, consult the local Johnson Controls
®
office. Johnson Controls shall not be liable for damages resulting from
misapplication or misuse of its products.
Product warranty
This product is covered by a limited warranty, details
IOM2721 Input/Output Module Installation Guide
16